*'''1949--'''Los Alamos County was created 16 March 1949&nbsp;from [[Sandoval County, New Mexico|Sandoval]] and [[Santa Fe County, New Mexico|Santa Fe]] Counties.

+

*Up until '''1821''' -&nbsp; [[New Spain]] controlled land that later would become New Mexico and Arizona. Some records of early settlers may have been sent to an [http://www.mcu.es/archivos/MC/AGI/index.html archives] in Seville, Spain, or to [[Mexico Archives and Libraries|archives]] in Mexico City. <br>

*From 1821 until '''1846''' -&nbsp;[[Mexico]] had jurisdiction over the land that later would become New Mexico and Arizona. Some records of this period may have been sent to [[Mexico Archives and Libraries|archives]] in Mexico City. Starting in 1846 United States forces occupied New Mexico during the {{wpd|Mexican-American War}}. <br>

−

*

+

*'''1848''' -&nbsp; Land that became Los Alamos County formally became a part of the United States when the Mexican-American War ended with ratification of the {{wpd|Treaty of Guadalupe Hidalgo}}.<br>

+

+

*'''1949--'''Los Alamos County was created 16 March 1949 from [[Sandoval County, New Mexico|Sandoval]] and [[Santa Fe County, New Mexico|Santa Fe]] Counties.<ref name="HBG" />

County Courthouse

County Clerk has marriage records from 1940, Land records from 1949, probate records from 1953 and burial records from 1961; Clerk District Courthas divorce and court records[1]

History

Parent County

Up until 1821 - New Spain controlled land that later would become New Mexico and Arizona. Some records of early settlers may have been sent to an archives in Seville, Spain, or to archives in Mexico City.

From 1821 until 1846 - Mexico had jurisdiction over the land that later would become New Mexico and Arizona. Some records of this period may have been sent to archives in Mexico City. Starting in 1846 United States forces occupied New Mexico during the Mexican-American War.

1848 - Land that became Los Alamos County formally became a part of the United States when the Mexican-American War ended with ratification of the Treaty of Guadalupe Hidalgo.